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# $Id: pppoe.py 23 2006-11-08 15:45:33Z dugsong $
# -*- coding: utf-8 -*-
"""PPP-over-Ethernet."""
import dpkt
import ppp
from decorators import deprecated
# RFC 2516 codes
PPPoE_PADI = 0x09
PPPoE_PADO = 0x07
PPPoE_PADR = 0x19
PPPoE_PADS = 0x65
PPPoE_PADT = 0xA7
PPPoE_SESSION = 0x00
class PPPoE(dpkt.Packet):
__hdr__ = (
('v_type', 'B', 0x11),
('code', 'B', 0),
('session', 'H', 0),
('len', 'H', 0) # payload length
)
@property
def v(self): return self.v_type >> 4
@v.setter
def v(self, v): self.v_type = (v << 4) | (self.v_type & 0xf)
@property
def type(self): return self.v_type & 0xf
@type.setter
def type(self, t): self.v_type = (self.v_type & 0xf0) | t
# Deprecated methods, will be removed in the future
# =================================================
@deprecated
def _get_v(self): return self.v
@deprecated
def _set_v(self, v): self.v = v
@deprecated
def _get_type(self): return self.type
@deprecated
def _set_type(self, t): self.type = t
# =================================================
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
try:
if self.code == 0:
self.data = self.ppp = ppp.PPP(self.data)
except dpkt.UnpackError:
pass
# XXX - TODO TLVs, etc.
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